I remember the interview, and from memory I asked the question. I'm reasonably sure the song in question is Opiate, and that the "curveball" is a video that is being made for it apparently directed by Dominic Hailstone.

It was supposed to be out last year, but as happens with all Tool things has been delayed.

Oh, and apparently Opiate has been rerecorded for this exercise - the extended version played on recent tours. It's never been confirmed but most assume that's what Tool were doing in the studio a year or two back when Motorhead were next door.